Search Results for ‘valves’

Hi everyone, I’m new to the 400ec forums, and I have a few questions. I bought a 2003 400ex about 2 months ago. Never had one but I’m a big Honda guy and have ridden a few. The guy didn’t know too much about it, all he knew was it got bored to a 440. It ran great up until a week or so. I was...

First-time poster here, so sorry in advance if this post is in the wrong place! So my 300ex was running fine a few weeks ago, and I was warming it up when all of the sudden it started sounding really bad (similar to bogging noise). I investigated the intake system and found nothing. The next...

So I recently bought a 2008 400ex. I noticed a ticking noise coming from the motor. Then I listened and heard a weird noise when giving it gas and then letting off. It does have a full fmf exhaust. I don't know if it makes a difference. But I was told no motor work has ever been done to it. I'm...

Okay guys, first 450r and I had to buy a new cylinder. The valve train was taken apart and it has to have new valves now. It has a "SiTec" valve head and I can't find and information! I don't think it is stock and don't know what size to get! Please help! I can post pictures if I need to...

Hey guys, I have a 2002 400ex. I bought it and it needed valves and a new piston with rings. I bought a spare motor and swapped the cylinder and piston onto the motor that is in my bike. The head had a bent valve, I took a good valve from my other head and put it right in there, I didn't get it...